raspberrypi-cpufreq: Only report integer pll divisor frequencies

drivers/cpufreq/raspberrypi-cpufreq.c

@@ -8,6 +8,7 @@
 #include <linux/clk.h>
 #include <linux/cpu.h>
 #include <linux/cpufreq.h>
+#include <linux/math64.h>
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/pm_opp.h>
@@ -22,6 +23,7 @@ static int raspberrypi_cpufreq_probe(struct platform_device *pdev)
  unsigned long min, max;
  unsigned long rate;
  struct clk *clk;
+ int div;
  int ret;
 
  cpu_dev = get_cpu_device(0);
@@ -44,7 +46,10 @@ static int raspberrypi_cpufreq_probe(struct platform_device *pdev)
  max = roundup(clk_round_rate(clk, ULONG_MAX), RASPBERRYPI_FREQ_INTERVAL);
  clk_put(clk);
 
- for (rate = min; rate <= max; rate += RASPBERRYPI_FREQ_INTERVAL) {
+ for (div = 2; ; div++) {
+ rate = div_u64((u64)max * 2, div);
+ if (rate < min)
+ break;
  ret = dev_pm_opp_add(cpu_dev, rate, 0);
  if (ret)
  goto remove_opp;